USB Drive not showing up correctly in 8.1 (works in 7.3)

[Warren Block]

On Sat, 15 Jan 2011, perryh at pluto.rain.com wrote:

> Jerahmy Pocott <quakenet1 at optusnet.com.au> wrote:
>
>> I have a USB Drive that was working fine under 7.3, but since
>> updating to 8.1 no longer has the correct /dev entries. Under
>> 7.3 it was da0s1, in 8.1 there is now only da0 and da0a, which
>> shouldn't exist...

da0s1 is MBR, da0a is "dangerously dedicated".  I would not expect 
differences between 7 and 8 USB to show that on an existing drive.  If 
the drive was reworked during the 7-to-8 upgrade--maybe with "bsdlabel 
auto"--that would be a more likely explanation.